It would be the equivalent of us going back 1,000 years and having to start from scratch." In response to these hypothetical - but experts say quite possible - threats, US President Donald Trump has set his eyes on a "next generation" missile shield: the Golden Dome.

He is keen to spend the equivalent of Ukraine’s GDP on the missile defence shield to fend off attacks from US enemies like Russia and China. Trump unveiled the dome plan in a bizarre press conference in the Oval Office yesterday,